2. Apply marine sealant to the following
surfaces to seal the hull and hold the
transducer firmly in place (Figure 3):
• Cable side of the transducer—Apply
the amount of marine sealant
determined by dry fitting the transducer
in the cavity,
plus an additional 3mm (1/8").
• Apply 6mm (1/4") of marine sealant to
the transducer surfaces that will contact
the cavity,
including the lip
.
• Apply 6mm (1/4") of marine sealant to
the cable fittings, being sure the marine
sealant extends 6mm (1/4") outside of
the cavity and into the hull.
• Apply 3mm (1/8") of marine sealant to
the threads of the purchased bolts.
• Apply 3mm (1/8") of marine sealant to
the surface of the purchased washers
that will contact the cavity.
• Apply 3mm (1/8") of marine sealant to
the side of the faceplate that will
contact the hull and the transducer’s lip.
• Apply 3mm (1/8") of marine sealant to
the fasteners that will hold the faceplate
to the hull.
3. From outside the hull, thread the transducer cable through the
hole in the mounting cavity. Push the transducer into the
mounting cavity and seat it firmly within the recess.
The
transducer’s face must be flush with the outside of the hull for
good performance
. If necessary, apply additional marine sealant
to the cable side of the transducer.
4. From inside the hull, screw a nut onto each bolt. Place one
washer against each nut so that the side with the sealant will be
against the cavity when installed. Screw each bolt into a
threaded hole in the transducer. Tighten the bolts using a torque
wrench with a force not exceeding 85 in.-lb. Do not over tighten.
5. When the boat is underway, especially at high speeds, water
will enter any gaps between the transducer and the hull and
push against the transducer with considerable force. From
outside the hull, fill any gaps between the transducer and the
cavity with marine sealant.
6. Fasten the faceplate to the hull.
7. Remove the excess sealant on the outside of the hull to ensure
smooth water flow under the transducer.
Cable Routing & Connecting
CAUTION:
If the transducer came with a connector, do not
remove it to ease cable routing. If the cable must be cut and
spliced, use Airmar’s splash-proof Junction Box No. 33-035 and
follow the instructions provided. Removing the water-proof
connector or cutting the cable, except when using water-tight
junction box, will void the transducer warranty.
1. Route the cable to the echosounder being careful not to tear the
cable jacket when passing it through the bulkhead(s) and other
parts of the boat. Use grommets to prevent chafing. To reduce
electrical interference, separate the transducer cable from other
electrical wiring and the engine(s). Coil any excess cable and
secure it in place with cable ties to prevent damage.
2. Refer to your echosounder owner’s manual to connect the
transducer to the instrument.
3
Copyright © 2021 Airmar Technology Corporation. All rights reserved.
35 Meadowbrook Drive, Milford, New Hampshire 03055-4613, USA
•
www.airmar.com
Checking for Leaks
When the boat is placed in the water,
immediately
check around
the transducer for leaks. Note that very small leaks may not be
readily observed. Do not leave the boat in the water for more than
3 hours before checking it again. If a leak is observed, repeat the
installation procedure
immediately
.
Maintenance & Replacement
Anti-fouling Coating
Surfaces exposed to salt water must be covered with an anti-
fouling coating. Use a water-based anti-fouling coating made for
transducers only. Never use ketone based anti-fouling paint, since
ketones can attack many plastics possibly damaging the
transducer. Brush on anti-fouling coating every 6 months or at the
beginning of each boating season.
Cleaning
Aquatic growth can accumulate rapidly on the transducer’s face,
reducing its performance within weeks. Clean the surface with a
Scotch-Brite
®
scour and mild household detergent, being careful
to
avoid making scratches
. If the fouling is severe, lightly wet sand
it with fine grade wet/dry paper.
Transducer Replacement & Parts
The information needed to order a replacement Airmar transducer is
printed on the cable tag. Do not remove this tag. When ordering,
specify the part number, date, and frequency in kHz. For convenient
reference, record this information near the top of page one.
Obtain parts from your instrument manufacturer or marine dealer.
Gemeco
USA
Tel: 803-693-0777
Email: [email protected]
Airmar EMEA
Europe, Middle East, Africa
Tel: +33.(0)2.23.52.06.48
Email: [email protected]
Figure 3. Bedding and installing
Copyright © 2021 Airmar Technology Corp.
bolt, nut &
marine
sealant
faceplate
fastener
(4 or more)
washer (3)
cable
transducer
hull
cavity
face
NOTE
: Dark areas
show marine sealant.